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From: Attilio Rao <attilio@FreeBSD.org>
Date: Mon, 6 Jul 2009 09:31:04 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/lib/libthr/thread thr_rtld.c thr_rwlock.c
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attilio     2009-07-06 09:31:04 UTC

  FreeBSD src repository

  Modified files:
    lib/libthr/thread    thr_rtld.c thr_rwlock.c 
  Log:
  SVN rev 195403 on 2009-07-06 09:31:04Z by attilio
  
  In the current code, rdlock_count is not correctly handled for some cases.
  The most notable is that it is not bumped in rwlock_rdlock_common() when
  the hard path (__thr_rwlock_rdlock()) returns successfully.
  This can lead to deadlocks in libthr when rwlocks recursion in read mode
  happens.
  Fix the interested parts by correctly handling rdlock_count.
  
  PR:             threads/136345
  Reported by:    rink
  Tested by:      rink
  Reviewed by:    jeff
  Approved by:    re (kib)
  MFC:            2 weeks
  
  Revision  Changes    Path
  1.12      +2 -0      src/lib/libthr/thread/thr_rtld.c
  1.16      +2 -1      src/lib/libthr/thread/thr_rwlock.c